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Re: st: Survival analysis - Inconstant event


From   "Miguel Angel Duran Munoz" <maduran@uma.es>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Survival analysis - Inconstant event
Date   Wed, 12 Jun 2013 17:41:36 +0200 (CEST)

Thanks, Tamas, for your answer. I will try to make clear my point. It is
similar to what you mention about being married. To perform a survival
analysis, I want to classify companies in my dataset in terms of whether a
variable (X) (the capital ratio) is above or below a threshold (t).
Accordingly, I have two very clear categories: (i) agents for which X
becomes larger than t at a particular period and remains above t up to the
end of the sample period; (ii) agents for which X is never above t in the
whole sample period.

However, I do also have agents for which X is above t just for some
intermediate (or starting) periods of the sample. And my question is
whether this latter category of agents can be handled by Stata in a
survival analysis.

Thanks in advance.

Miguel.


> Dear Miguel,
>
> This question is too general to be answered, you should tell us some
> details
> about your data.
>
> The sequence you present fits the pattern exhibited by recurrent events.
> For instance,
> the agent is single, then married, then single (divorced) again.Then the
> agent is at the risk
> of marrying again. More examples can be found quite easily.
>
> Tamas
>
> On 13/06/12, Miguel Angel Duran Munoz  <maduran@uma.es> wrote:
>> Hi, Statalisters. I am not sure whether in a survival analysis I can
>> reflect the following sequence of events: (1) during some periods, an
>> agent does not fit into a certain category (specifically, a variable
>> characterizing that agent is lower than a threshold); (2) after a
>> concrete
>> moment, the agent fits into the category (the variable is above the
>> threshold); 3) but then, after a few periods, the individual, again,
>> does
>> not fit into the category (the variable is below the threshold).
>>
>> Will anyone please help me with this?
>>
>> Thanks in advance.
>>
>> Miguel.
>>
>> *
>> *   For searches and help try:
>> *   http://www.stata.com/help.cgi?search
>> *   http://www.stata.com/support/faqs/resources/statalist-faq/
>> *   http://www.ats.ucla.edu/stat/stata/
>>
>>
> --
>
> Tamas Bartus, PhD
> Associate Professor, Deputy Director
> Institute of Sociology and Social Policy
> Corvinus University, Budapest
> 1093 Budapest, Közraktár utca 4-6.
> Room 424.
> Phone:  +36-1-482-7301
> Fax:          +36-1-482-7348
> Homepage: http://web.uni-corvinus.hu/bartus
>
> *
> *   For searches and help try:
> *   http://www.stata.com/help.cgi?search
> *   http://www.stata.com/support/faqs/resources/statalist-faq/
> *   http://www.ats.ucla.edu/stat/stata/
>


*
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*   http://www.ats.ucla.edu/stat/stata/


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